Bill Ackman, Ronald Lauder, William Lauder, Barry Diller and Dan Loeb have all made large donations to stop Mamdani. So have several non-New Yorkers.

A reported 26 billionaires and rich families have spent at least $100,000 to support independent candidate Andrew Cuomo.

Mamdani's success in New York resonates across country and globe, but final days of race could make or break movement.

Bill Ackman, Ronald Lauder, William Lauder, Barry Diller and Dan Loeb have all made large donations to stop Mamdani. So have several non-New Yorkers.

At least 26 billionaires spent millions trying to stop Mamdani from becoming New York’s next mayor. More surprising are the two billionaires who backed him.